| 1 | /* |
| 2 | * psftp.c: front end for PSFTP. |
| 3 | */ |
| 4 | |
| 5 | #include <windows.h> |
| 6 | |
| 7 | #include <stdio.h> |
| 8 | #include <stdlib.h> |
| 9 | #include <stdarg.h> |
| 10 | #include <assert.h> |
| 11 | #include <limits.h> |
| 12 | |
| 13 | #define PUTTY_DO_GLOBALS |
| 14 | #include "putty.h" |
| 15 | #include "storage.h" |
| 16 | #include "ssh.h" |
| 17 | #include "sftp.h" |
| 18 | #include "int64.h" |
| 19 | |
| 20 | /* |
| 21 | * Since SFTP is a request-response oriented protocol, it requires |
| 22 | * no buffer management: when we send data, we stop and wait for an |
| 23 | * acknowledgement _anyway_, and so we can't possibly overfill our |
| 24 | * send buffer. |
| 25 | */ |
| 26 | |
| 27 | /* ---------------------------------------------------------------------- |
| 28 | * sftp client state. |
| 29 | */ |
| 30 | |
| 31 | char *pwd, *homedir; |
| 32 | |
| 33 | /* ---------------------------------------------------------------------- |
| 34 | * Higher-level helper functions used in commands. |
| 35 | */ |
| 36 | |
| 37 | /* |
| 38 | * Attempt to canonify a pathname starting from the pwd. If |
| 39 | * canonification fails, at least fall back to returning a _valid_ |
| 40 | * pathname (though it may be ugly, eg /home/simon/../foobar). |
| 41 | */ |
| 42 | char *canonify(char *name) |
| 43 | { |
| 44 | char *fullname, *canonname; |
| 45 | |
| 46 | if (name[0] == '/') { |
| 47 | fullname = dupstr(name); |
| 48 | } else { |
| 49 | char *slash; |
| 50 | if (pwd[strlen(pwd) - 1] == '/') |
| 51 | slash = ""; |
| 52 | else |
| 53 | slash = "/"; |
| 54 | fullname = dupcat(pwd, slash, name, NULL); |
| 55 | } |
| 56 | |
| 57 | canonname = fxp_realpath(fullname); |
| 58 | |
| 59 | if (canonname) { |
| 60 | sfree(fullname); |
| 61 | return canonname; |
| 62 | } else { |
| 63 | /* |
| 64 | * Attempt number 2. Some FXP_REALPATH implementations |
| 65 | * (glibc-based ones, in particular) require the _whole_ |
| 66 | * path to point to something that exists, whereas others |
| 67 | * (BSD-based) only require all but the last component to |
| 68 | * exist. So if the first call failed, we should strip off |
| 69 | * everything from the last slash onwards and try again, |
| 70 | * then put the final component back on. |
| 71 | * |
| 72 | * Special cases: |
| 73 | * |
| 74 | * - if the last component is "/." or "/..", then we don't |
| 75 | * bother trying this because there's no way it can work. |
| 76 | * |
| 77 | * - if the thing actually ends with a "/", we remove it |
| 78 | * before we start. Except if the string is "/" itself |
| 79 | * (although I can't see why we'd have got here if so, |
| 80 | * because surely "/" would have worked the first |
| 81 | * time?), in which case we don't bother. |
| 82 | * |
| 83 | * - if there's no slash in the string at all, give up in |
| 84 | * confusion (we expect at least one because of the way |
| 85 | * we constructed the string). |
| 86 | */ |
| 87 | |
| 88 | int i; |
| 89 | char *returnname; |
| 90 | |
| 91 | i = strlen(fullname); |
| 92 | if (i > 2 && fullname[i - 1] == '/') |
| 93 | fullname[--i] = '\0'; /* strip trailing / unless at pos 0 */ |
| 94 | while (i > 0 && fullname[--i] != '/'); |
| 95 | |
| 96 | /* |
| 97 | * Give up on special cases. |
| 98 | */ |
| 99 | if (fullname[i] != '/' || /* no slash at all */ |
| 100 | !strcmp(fullname + i, "/.") || /* ends in /. */ |
| 101 | !strcmp(fullname + i, "/..") || /* ends in /.. */ |
| 102 | !strcmp(fullname, "/")) { |
| 103 | return fullname; |
| 104 | } |
| 105 | |
| 106 | /* |
| 107 | * Now i points at the slash. Deal with the final special |
| 108 | * case i==0 (ie the whole path was "/nonexistentfile"). |
| 109 | */ |
| 110 | fullname[i] = '\0'; /* separate the string */ |
| 111 | if (i == 0) { |
| 112 | canonname = fxp_realpath("/"); |
| 113 | } else { |
| 114 | canonname = fxp_realpath(fullname); |
| 115 | } |
| 116 | |
| 117 | if (!canonname) |
| 118 | return fullname; /* even that failed; give up */ |
| 119 | |
| 120 | /* |
| 121 | * We have a canonical name for all but the last path |
| 122 | * component. Concatenate the last component and return. |
| 123 | */ |
| 124 | returnname = dupcat(canonname, |
| 125 | canonname[strlen(canonname) - 1] == |
| 126 | '/' ? "" : "/", fullname + i + 1, NULL); |
| 127 | sfree(fullname); |
| 128 | sfree(canonname); |
| 129 | return returnname; |
| 130 | } |
| 131 | } |
| 132 | |
| 133 | /* ---------------------------------------------------------------------- |
| 134 | * Actual sftp commands. |
| 135 | */ |
| 136 | struct sftp_command { |
| 137 | char **words; |
| 138 | int nwords, wordssize; |
| 139 | int (*obey) (struct sftp_command *); /* returns <0 to quit */ |
| 140 | }; |
| 141 | |
| 142 | int sftp_cmd_null(struct sftp_command *cmd) |
| 143 | { |
| 144 | return 0; |
| 145 | } |
| 146 | |
| 147 | int sftp_cmd_unknown(struct sftp_command *cmd) |
| 148 | { |
| 149 | printf("psftp: unknown command \"%s\"\n", cmd->words[0]); |
| 150 | return 0; |
| 151 | } |
| 152 | |
| 153 | int sftp_cmd_quit(struct sftp_command *cmd) |
| 154 | { |
| 155 | return -1; |
| 156 | } |
| 157 | |
| 158 | /* |
| 159 | * List a directory. If no arguments are given, list pwd; otherwise |
| 160 | * list the directory given in words[1]. |
| 161 | */ |
| 162 | static int sftp_ls_compare(const void *av, const void *bv) |
| 163 | { |
| 164 | const struct fxp_name *a = (const struct fxp_name *) av; |
| 165 | const struct fxp_name *b = (const struct fxp_name *) bv; |
| 166 | return strcmp(a->filename, b->filename); |
| 167 | } |
| 168 | int sftp_cmd_ls(struct sftp_command *cmd) |
| 169 | { |
| 170 | struct fxp_handle *dirh; |
| 171 | struct fxp_names *names; |
| 172 | struct fxp_name *ournames; |
| 173 | int nnames, namesize; |
| 174 | char *dir, *cdir; |
| 175 | int i; |
| 176 | |
| 177 | if (cmd->nwords < 2) |
| 178 | dir = "."; |
| 179 | else |
| 180 | dir = cmd->words[1]; |
| 181 | |
| 182 | cdir = canonify(dir); |
| 183 | if (!cdir) { |
| 184 | printf("%s: %s\n", dir, fxp_error()); |
| 185 | return 0; |
| 186 | } |
| 187 | |
| 188 | printf("Listing directory %s\n", cdir); |
| 189 | |
| 190 | dirh = fxp_opendir(cdir); |
| 191 | if (dirh == NULL) { |
| 192 | printf("Unable to open %s: %s\n", dir, fxp_error()); |
| 193 | } else { |
| 194 | nnames = namesize = 0; |
| 195 | ournames = NULL; |
| 196 | |
| 197 | while (1) { |
| 198 | |
| 199 | names = fxp_readdir(dirh); |
| 200 | if (names == NULL) { |
| 201 | if (fxp_error_type() == SSH_FX_EOF) |
| 202 | break; |
| 203 | printf("Reading directory %s: %s\n", dir, fxp_error()); |
| 204 | break; |
| 205 | } |
| 206 | if (names->nnames == 0) { |
| 207 | fxp_free_names(names); |
| 208 | break; |
| 209 | } |
| 210 | |
| 211 | if (nnames + names->nnames >= namesize) { |
| 212 | namesize += names->nnames + 128; |
| 213 | ournames = |
| 214 | srealloc(ournames, namesize * sizeof(*ournames)); |
| 215 | } |
| 216 | |
| 217 | for (i = 0; i < names->nnames; i++) |
| 218 | ournames[nnames++] = names->names[i]; |
| 219 | |
| 220 | names->nnames = 0; /* prevent free_names */ |
| 221 | fxp_free_names(names); |
| 222 | } |
| 223 | fxp_close(dirh); |
| 224 | |
| 225 | /* |
| 226 | * Now we have our filenames. Sort them by actual file |
| 227 | * name, and then output the longname parts. |
| 228 | */ |
| 229 | qsort(ournames, nnames, sizeof(*ournames), sftp_ls_compare); |
| 230 | |
| 231 | /* |
| 232 | * And print them. |
| 233 | */ |
| 234 | for (i = 0; i < nnames; i++) |
| 235 | printf("%s\n", ournames[i].longname); |
| 236 | } |
| 237 | |
| 238 | sfree(cdir); |
| 239 | |
| 240 | return 0; |
| 241 | } |
| 242 | |
| 243 | /* |
| 244 | * Change directories. We do this by canonifying the new name, then |
| 245 | * trying to OPENDIR it. Only if that succeeds do we set the new pwd. |
| 246 | */ |
| 247 | int sftp_cmd_cd(struct sftp_command *cmd) |
| 248 | { |
| 249 | struct fxp_handle *dirh; |
| 250 | char *dir; |
| 251 | |
| 252 | if (cmd->nwords < 2) |
| 253 | dir = dupstr(homedir); |
| 254 | else |
| 255 | dir = canonify(cmd->words[1]); |
| 256 | |
| 257 | if (!dir) { |
| 258 | printf("%s: %s\n", dir, fxp_error()); |
| 259 | return 0; |
| 260 | } |
| 261 | |
| 262 | dirh = fxp_opendir(dir); |
| 263 | if (!dirh) { |
| 264 | printf("Directory %s: %s\n", dir, fxp_error()); |
| 265 | sfree(dir); |
| 266 | return 0; |
| 267 | } |
| 268 | |
| 269 | fxp_close(dirh); |
| 270 | |
| 271 | sfree(pwd); |
| 272 | pwd = dir; |
| 273 | printf("Remote directory is now %s\n", pwd); |
| 274 | |
| 275 | return 0; |
| 276 | } |
| 277 | |
| 278 | /* |
| 279 | * Get a file and save it at the local end. We have two very |
| 280 | * similar commands here: `get' and `reget', which differ in that |
| 281 | * `reget' checks for the existence of the destination file and |
| 282 | * starts from where a previous aborted transfer left off. |
| 283 | */ |
| 284 | int sftp_general_get(struct sftp_command *cmd, int restart) |
| 285 | { |
| 286 | struct fxp_handle *fh; |
| 287 | char *fname, *outfname; |
| 288 | uint64 offset; |
| 289 | FILE *fp; |
| 290 | |
| 291 | if (cmd->nwords < 2) { |
| 292 | printf("get: expects a filename\n"); |
| 293 | return 0; |
| 294 | } |
| 295 | |
| 296 | fname = canonify(cmd->words[1]); |
| 297 | if (!fname) { |
| 298 | printf("%s: %s\n", cmd->words[1], fxp_error()); |
| 299 | return 0; |
| 300 | } |
| 301 | outfname = (cmd->nwords == 2 ? cmd->words[1] : cmd->words[2]); |
| 302 | |
| 303 | fh = fxp_open(fname, SSH_FXF_READ); |
| 304 | if (!fh) { |
| 305 | printf("%s: %s\n", fname, fxp_error()); |
| 306 | sfree(fname); |
| 307 | return 0; |
| 308 | } |
| 309 | |
| 310 | if (restart) { |
| 311 | fp = fopen(outfname, "rb+"); |
| 312 | } else { |
| 313 | fp = fopen(outfname, "wb"); |
| 314 | } |
| 315 | |
| 316 | if (!fp) { |
| 317 | printf("local: unable to open %s\n", outfname); |
| 318 | fxp_close(fh); |
| 319 | sfree(fname); |
| 320 | return 0; |
| 321 | } |
| 322 | |
| 323 | if (restart) { |
| 324 | long posn; |
| 325 | fseek(fp, 0L, SEEK_END); |
| 326 | posn = ftell(fp); |
| 327 | printf("reget: restarting at file position %ld\n", posn); |
| 328 | offset = uint64_make(0, posn); |
| 329 | } else { |
| 330 | offset = uint64_make(0, 0); |
| 331 | } |
| 332 | |
| 333 | printf("remote:%s => local:%s\n", fname, outfname); |
| 334 | |
| 335 | /* |
| 336 | * FIXME: we can use FXP_FSTAT here to get the file size, and |
| 337 | * thus put up a progress bar. |
| 338 | */ |
| 339 | while (1) { |
| 340 | char buffer[4096]; |
| 341 | int len; |
| 342 | int wpos, wlen; |
| 343 | |
| 344 | len = fxp_read(fh, buffer, offset, sizeof(buffer)); |
| 345 | if ((len == -1 && fxp_error_type() == SSH_FX_EOF) || len == 0) |
| 346 | break; |
| 347 | if (len == -1) { |
| 348 | printf("error while reading: %s\n", fxp_error()); |
| 349 | break; |
| 350 | } |
| 351 | |
| 352 | wpos = 0; |
| 353 | while (wpos < len) { |
| 354 | wlen = fwrite(buffer, 1, len - wpos, fp); |
| 355 | if (wlen <= 0) { |
| 356 | printf("error while writing local file\n"); |
| 357 | break; |
| 358 | } |
| 359 | wpos += wlen; |
| 360 | } |
| 361 | if (wpos < len) /* we had an error */ |
| 362 | break; |
| 363 | offset = uint64_add32(offset, len); |
| 364 | } |
| 365 | |
| 366 | fclose(fp); |
| 367 | fxp_close(fh); |
| 368 | sfree(fname); |
| 369 | |
| 370 | return 0; |
| 371 | } |
| 372 | int sftp_cmd_get(struct sftp_command *cmd) |
| 373 | { |
| 374 | return sftp_general_get(cmd, 0); |
| 375 | } |
| 376 | int sftp_cmd_reget(struct sftp_command *cmd) |
| 377 | { |
| 378 | return sftp_general_get(cmd, 1); |
| 379 | } |
| 380 | |
| 381 | /* |
| 382 | * Send a file and store it at the remote end. We have two very |
| 383 | * similar commands here: `put' and `reput', which differ in that |
| 384 | * `reput' checks for the existence of the destination file and |
| 385 | * starts from where a previous aborted transfer left off. |
| 386 | */ |
| 387 | int sftp_general_put(struct sftp_command *cmd, int restart) |
| 388 | { |
| 389 | struct fxp_handle *fh; |
| 390 | char *fname, *origoutfname, *outfname; |
| 391 | uint64 offset; |
| 392 | FILE *fp; |
| 393 | |
| 394 | if (cmd->nwords < 2) { |
| 395 | printf("put: expects a filename\n"); |
| 396 | return 0; |
| 397 | } |
| 398 | |
| 399 | fname = cmd->words[1]; |
| 400 | origoutfname = (cmd->nwords == 2 ? cmd->words[1] : cmd->words[2]); |
| 401 | outfname = canonify(origoutfname); |
| 402 | if (!outfname) { |
| 403 | printf("%s: %s\n", origoutfname, fxp_error()); |
| 404 | return 0; |
| 405 | } |
| 406 | |
| 407 | fp = fopen(fname, "rb"); |
| 408 | if (!fp) { |
| 409 | printf("local: unable to open %s\n", fname); |
| 410 | sfree(outfname); |
| 411 | return 0; |
| 412 | } |
| 413 | if (restart) { |
| 414 | fh = fxp_open(outfname, |
| 415 | SSH_FXF_WRITE); |
| 416 | } else { |
| 417 | fh = fxp_open(outfname, |
| 418 | SSH_FXF_WRITE | SSH_FXF_CREAT | SSH_FXF_TRUNC); |
| 419 | } |
| 420 | if (!fh) { |
| 421 | printf("%s: %s\n", outfname, fxp_error()); |
| 422 | sfree(outfname); |
| 423 | return 0; |
| 424 | } |
| 425 | |
| 426 | if (restart) { |
| 427 | char decbuf[30]; |
| 428 | struct fxp_attrs attrs; |
| 429 | if (!fxp_fstat(fh, &attrs)) { |
| 430 | printf("read size of %s: %s\n", outfname, fxp_error()); |
| 431 | sfree(outfname); |
| 432 | return 0; |
| 433 | } |
| 434 | if (!(attrs.flags & SSH_FILEXFER_ATTR_SIZE)) { |
| 435 | printf("read size of %s: size was not given\n", outfname); |
| 436 | sfree(outfname); |
| 437 | return 0; |
| 438 | } |
| 439 | offset = attrs.size; |
| 440 | uint64_decimal(offset, decbuf); |
| 441 | printf("reput: restarting at file position %s\n", decbuf); |
| 442 | if (uint64_compare(offset, uint64_make(0, LONG_MAX)) > 0) { |
| 443 | printf("reput: remote file is larger than we can deal with\n"); |
| 444 | sfree(outfname); |
| 445 | return 0; |
| 446 | } |
| 447 | if (fseek(fp, offset.lo, SEEK_SET) != 0) |
| 448 | fseek(fp, 0, SEEK_END); /* *shrug* */ |
| 449 | } else { |
| 450 | offset = uint64_make(0, 0); |
| 451 | } |
| 452 | |
| 453 | printf("local:%s => remote:%s\n", fname, outfname); |
| 454 | |
| 455 | /* |
| 456 | * FIXME: we can use FXP_FSTAT here to get the file size, and |
| 457 | * thus put up a progress bar. |
| 458 | */ |
| 459 | while (1) { |
| 460 | char buffer[4096]; |
| 461 | int len; |
| 462 | |
| 463 | len = fread(buffer, 1, sizeof(buffer), fp); |
| 464 | if (len == -1) { |
| 465 | printf("error while reading local file\n"); |
| 466 | break; |
| 467 | } else if (len == 0) { |
| 468 | break; |
| 469 | } |
| 470 | if (!fxp_write(fh, buffer, offset, len)) { |
| 471 | printf("error while writing: %s\n", fxp_error()); |
| 472 | break; |
| 473 | } |
| 474 | offset = uint64_add32(offset, len); |
| 475 | } |
| 476 | |
| 477 | fxp_close(fh); |
| 478 | fclose(fp); |
| 479 | sfree(outfname); |
| 480 | |
| 481 | return 0; |
| 482 | } |
| 483 | int sftp_cmd_put(struct sftp_command *cmd) |
| 484 | { |
| 485 | return sftp_general_put(cmd, 0); |
| 486 | } |
| 487 | int sftp_cmd_reput(struct sftp_command *cmd) |
| 488 | { |
| 489 | return sftp_general_put(cmd, 1); |
| 490 | } |
| 491 | |
| 492 | int sftp_cmd_mkdir(struct sftp_command *cmd) |
| 493 | { |
| 494 | char *dir; |
| 495 | int result; |
| 496 | |
| 497 | |
| 498 | if (cmd->nwords < 2) { |
| 499 | printf("mkdir: expects a directory\n"); |
| 500 | return 0; |
| 501 | } |
| 502 | |
| 503 | dir = canonify(cmd->words[1]); |
| 504 | if (!dir) { |
| 505 | printf("%s: %s\n", dir, fxp_error()); |
| 506 | return 0; |
| 507 | } |
| 508 | |
| 509 | result = fxp_mkdir(dir); |
| 510 | if (!result) { |
| 511 | printf("mkdir %s: %s\n", dir, fxp_error()); |
| 512 | sfree(dir); |
| 513 | return 0; |
| 514 | } |
| 515 | |
| 516 | sfree(dir); |
| 517 | return 0; |
| 518 | } |
| 519 | |
| 520 | int sftp_cmd_rmdir(struct sftp_command *cmd) |
| 521 | { |
| 522 | char *dir; |
| 523 | int result; |
| 524 | |
| 525 | |
| 526 | if (cmd->nwords < 2) { |
| 527 | printf("rmdir: expects a directory\n"); |
| 528 | return 0; |
| 529 | } |
| 530 | |
| 531 | dir = canonify(cmd->words[1]); |
| 532 | if (!dir) { |
| 533 | printf("%s: %s\n", dir, fxp_error()); |
| 534 | return 0; |
| 535 | } |
| 536 | |
| 537 | result = fxp_rmdir(dir); |
| 538 | if (!result) { |
| 539 | printf("rmdir %s: %s\n", dir, fxp_error()); |
| 540 | sfree(dir); |
| 541 | return 0; |
| 542 | } |
| 543 | |
| 544 | sfree(dir); |
| 545 | return 0; |
| 546 | } |
| 547 | |
| 548 | int sftp_cmd_rm(struct sftp_command *cmd) |
| 549 | { |
| 550 | char *fname; |
| 551 | int result; |
| 552 | |
| 553 | if (cmd->nwords < 2) { |
| 554 | printf("rm: expects a filename\n"); |
| 555 | return 0; |
| 556 | } |
| 557 | |
| 558 | fname = canonify(cmd->words[1]); |
| 559 | if (!fname) { |
| 560 | printf("%s: %s\n", fname, fxp_error()); |
| 561 | return 0; |
| 562 | } |
| 563 | |
| 564 | result = fxp_remove(fname); |
| 565 | if (!result) { |
| 566 | printf("rm %s: %s\n", fname, fxp_error()); |
| 567 | sfree(fname); |
| 568 | return 0; |
| 569 | } |
| 570 | |
| 571 | sfree(fname); |
| 572 | return 0; |
| 573 | |
| 574 | } |
| 575 | |
| 576 | int sftp_cmd_mv(struct sftp_command *cmd) |
| 577 | { |
| 578 | char *srcfname, *dstfname; |
| 579 | int result; |
| 580 | |
| 581 | if (cmd->nwords < 3) { |
| 582 | printf("mv: expects two filenames\n"); |
| 583 | return 0; |
| 584 | } |
| 585 | srcfname = canonify(cmd->words[1]); |
| 586 | if (!srcfname) { |
| 587 | printf("%s: %s\n", srcfname, fxp_error()); |
| 588 | return 0; |
| 589 | } |
| 590 | |
| 591 | dstfname = canonify(cmd->words[2]); |
| 592 | if (!dstfname) { |
| 593 | printf("%s: %s\n", dstfname, fxp_error()); |
| 594 | return 0; |
| 595 | } |
| 596 | |
| 597 | result = fxp_rename(srcfname, dstfname); |
| 598 | if (!result) { |
| 599 | char const *error = fxp_error(); |
| 600 | struct fxp_attrs attrs; |
| 601 | |
| 602 | /* |
| 603 | * The move might have failed because dstfname pointed at a |
| 604 | * directory. We check this possibility now: if dstfname |
| 605 | * _is_ a directory, we re-attempt the move by appending |
| 606 | * the basename of srcfname to dstfname. |
| 607 | */ |
| 608 | result = fxp_stat(dstfname, &attrs); |
| 609 | if (result && |
| 610 | (attrs.flags & SSH_FILEXFER_ATTR_PERMISSIONS) && |
| 611 | (attrs.permissions & 0040000)) { |
| 612 | char *p; |
| 613 | char *newname, *newcanon; |
| 614 | printf("(destination %s is a directory)\n", dstfname); |
| 615 | p = srcfname + strlen(srcfname); |
| 616 | while (p > srcfname && p[-1] != '/') p--; |
| 617 | newname = dupcat(dstfname, "/", p, NULL); |
| 618 | newcanon = canonify(newname); |
| 619 | sfree(newname); |
| 620 | if (newcanon) { |
| 621 | sfree(dstfname); |
| 622 | dstfname = newcanon; |
| 623 | result = fxp_rename(srcfname, dstfname); |
| 624 | error = result ? NULL : fxp_error(); |
| 625 | } |
| 626 | } |
| 627 | if (error) { |
| 628 | printf("mv %s %s: %s\n", srcfname, dstfname, error); |
| 629 | sfree(srcfname); |
| 630 | sfree(dstfname); |
| 631 | return 0; |
| 632 | } |
| 633 | } |
| 634 | printf("%s -> %s\n", srcfname, dstfname); |
| 635 | |
| 636 | sfree(srcfname); |
| 637 | sfree(dstfname); |
| 638 | return 0; |
| 639 | } |
| 640 | |
| 641 | int sftp_cmd_chmod(struct sftp_command *cmd) |
| 642 | { |
| 643 | char *fname, *mode; |
| 644 | int result; |
| 645 | struct fxp_attrs attrs; |
| 646 | unsigned attrs_clr, attrs_xor, oldperms, newperms; |
| 647 | |
| 648 | if (cmd->nwords < 3) { |
| 649 | printf("chmod: expects a mode specifier and a filename\n"); |
| 650 | return 0; |
| 651 | } |
| 652 | |
| 653 | /* |
| 654 | * Attempt to parse the mode specifier in cmd->words[1]. We |
| 655 | * don't support the full horror of Unix chmod; instead we |
| 656 | * support a much simpler syntax in which the user can either |
| 657 | * specify an octal number, or a comma-separated sequence of |
| 658 | * [ugoa]*[-+=][rwxst]+. (The initial [ugoa] sequence may |
| 659 | * _only_ be omitted if the only attribute mentioned is t, |
| 660 | * since all others require a user/group/other specification. |
| 661 | * Additionally, the s attribute may not be specified for any |
| 662 | * [ugoa] specifications other than exactly u or exactly g. |
| 663 | */ |
| 664 | attrs_clr = attrs_xor = 0; |
| 665 | mode = cmd->words[1]; |
| 666 | if (mode[0] >= '0' && mode[0] <= '9') { |
| 667 | if (mode[strspn(mode, "01234567")]) { |
| 668 | printf("chmod: numeric file modes should" |
| 669 | " contain digits 0-7 only\n"); |
| 670 | return 0; |
| 671 | } |
| 672 | attrs_clr = 07777; |
| 673 | sscanf(mode, "%o", &attrs_xor); |
| 674 | attrs_xor &= attrs_clr; |
| 675 | } else { |
| 676 | while (*mode) { |
| 677 | char *modebegin = mode; |
| 678 | unsigned subset, perms; |
| 679 | int action; |
| 680 | |
| 681 | subset = 0; |
| 682 | while (*mode && *mode != ',' && |
| 683 | *mode != '+' && *mode != '-' && *mode != '=') { |
| 684 | switch (*mode) { |
| 685 | case 'u': subset |= 04700; break; /* setuid, user perms */ |
| 686 | case 'g': subset |= 02070; break; /* setgid, group perms */ |
| 687 | case 'o': subset |= 00007; break; /* just other perms */ |
| 688 | case 'a': subset |= 06777; break; /* all of the above */ |
| 689 | default: |
| 690 | printf("chmod: file mode '%.*s' contains unrecognised" |
| 691 | " user/group/other specifier '%c'\n", |
| 692 | strcspn(modebegin, ","), modebegin, *mode); |
| 693 | return 0; |
| 694 | } |
| 695 | mode++; |
| 696 | } |
| 697 | if (!*mode || *mode == ',') { |
| 698 | printf("chmod: file mode '%.*s' is incomplete\n", |
| 699 | strcspn(modebegin, ","), modebegin); |
| 700 | return 0; |
| 701 | } |
| 702 | action = *mode++; |
| 703 | if (!*mode || *mode == ',') { |
| 704 | printf("chmod: file mode '%.*s' is incomplete\n", |
| 705 | strcspn(modebegin, ","), modebegin); |
| 706 | return 0; |
| 707 | } |
| 708 | perms = 0; |
| 709 | while (*mode && *mode != ',') { |
| 710 | switch (*mode) { |
| 711 | case 'r': perms |= 00444; break; |
| 712 | case 'w': perms |= 00222; break; |
| 713 | case 'x': perms |= 00111; break; |
| 714 | case 't': perms |= 01000; subset |= 01000; break; |
| 715 | case 's': |
| 716 | if ((subset & 06777) != 04700 && |
| 717 | (subset & 06777) != 02070) { |
| 718 | printf("chmod: file mode '%.*s': set[ug]id bit should" |
| 719 | " be used with exactly one of u or g only\n", |
| 720 | strcspn(modebegin, ","), modebegin); |
| 721 | return 0; |
| 722 | } |
| 723 | perms |= 06000; |
| 724 | break; |
| 725 | default: |
| 726 | printf("chmod: file mode '%.*s' contains unrecognised" |
| 727 | " permission specifier '%c'\n", |
| 728 | strcspn(modebegin, ","), modebegin, *mode); |
| 729 | return 0; |
| 730 | } |
| 731 | mode++; |
| 732 | } |
| 733 | if (!(subset & 06777) && (perms &~ subset)) { |
| 734 | printf("chmod: file mode '%.*s' contains no user/group/other" |
| 735 | " specifier and permissions other than 't' \n", |
| 736 | strcspn(modebegin, ","), modebegin, *mode); |
| 737 | return 0; |
| 738 | } |
| 739 | perms &= subset; |
| 740 | switch (action) { |
| 741 | case '+': |
| 742 | attrs_clr |= perms; |
| 743 | attrs_xor |= perms; |
| 744 | break; |
| 745 | case '-': |
| 746 | attrs_clr |= perms; |
| 747 | attrs_xor &= ~perms; |
| 748 | break; |
| 749 | case '=': |
| 750 | attrs_clr |= subset; |
| 751 | attrs_xor |= perms; |
| 752 | break; |
| 753 | } |
| 754 | if (*mode) mode++; /* eat comma */ |
| 755 | } |
| 756 | } |
| 757 | |
| 758 | fname = canonify(cmd->words[2]); |
| 759 | if (!fname) { |
| 760 | printf("%s: %s\n", fname, fxp_error()); |
| 761 | return 0; |
| 762 | } |
| 763 | |
| 764 | result = fxp_stat(fname, &attrs); |
| 765 | if (!result || !(attrs.flags & SSH_FILEXFER_ATTR_PERMISSIONS)) { |
| 766 | printf("get attrs for %s: %s\n", fname, |
| 767 | result ? "file permissions not provided" : fxp_error()); |
| 768 | sfree(fname); |
| 769 | return 0; |
| 770 | } |
| 771 | |
| 772 | attrs.flags = SSH_FILEXFER_ATTR_PERMISSIONS; /* perms _only_ */ |
| 773 | oldperms = attrs.permissions & 07777; |
| 774 | attrs.permissions &= ~attrs_clr; |
| 775 | attrs.permissions ^= attrs_xor; |
| 776 | newperms = attrs.permissions & 07777; |
| 777 | |
| 778 | result = fxp_setstat(fname, attrs); |
| 779 | |
| 780 | if (!result) { |
| 781 | printf("set attrs for %s: %s\n", fname, fxp_error()); |
| 782 | sfree(fname); |
| 783 | return 0; |
| 784 | } |
| 785 | |
| 786 | printf("%s: %04o -> %04o\n", fname, oldperms, newperms); |
| 787 | |
| 788 | sfree(fname); |
| 789 | return 0; |
| 790 | } |
| 791 | |
| 792 | static struct sftp_cmd_lookup { |
| 793 | char *name; |
| 794 | int (*obey) (struct sftp_command *); |
| 795 | } sftp_lookup[] = { |
| 796 | /* |
| 797 | * List of sftp commands. This is binary-searched so it MUST be |
| 798 | * in ASCII order. |
| 799 | */ |
| 800 | { |
| 801 | "bye", sftp_cmd_quit}, { |
| 802 | "cd", sftp_cmd_cd}, { |
| 803 | "chmod", sftp_cmd_chmod}, { |
| 804 | "del", sftp_cmd_rm}, { |
| 805 | "delete", sftp_cmd_rm}, { |
| 806 | "dir", sftp_cmd_ls}, { |
| 807 | "exit", sftp_cmd_quit}, { |
| 808 | "get", sftp_cmd_get}, { |
| 809 | "ls", sftp_cmd_ls}, { |
| 810 | "mkdir", sftp_cmd_mkdir}, { |
| 811 | "mv", sftp_cmd_mv}, { |
| 812 | "put", sftp_cmd_put}, { |
| 813 | "quit", sftp_cmd_quit}, { |
| 814 | "reget", sftp_cmd_reget}, { |
| 815 | "ren", sftp_cmd_mv}, { |
| 816 | "rename", sftp_cmd_mv}, { |
| 817 | "reput", sftp_cmd_reput}, { |
| 818 | "rm", sftp_cmd_rm}, { |
| 819 | "rmdir", sftp_cmd_rmdir},}; |
| 820 | |
| 821 | /* ---------------------------------------------------------------------- |
| 822 | * Command line reading and parsing. |
| 823 | */ |
| 824 | struct sftp_command *sftp_getcmd(FILE *fp, int mode, int modeflags) |
| 825 | { |
| 826 | char *line; |
| 827 | int linelen, linesize; |
| 828 | struct sftp_command *cmd; |
| 829 | char *p, *q, *r; |
| 830 | int quoting; |
| 831 | |
| 832 | if ((mode == 0) || (modeflags & 1)) { |
| 833 | printf("psftp> "); |
| 834 | } |
| 835 | fflush(stdout); |
| 836 | |
| 837 | cmd = smalloc(sizeof(struct sftp_command)); |
| 838 | cmd->words = NULL; |
| 839 | cmd->nwords = 0; |
| 840 | cmd->wordssize = 0; |
| 841 | |
| 842 | line = NULL; |
| 843 | linesize = linelen = 0; |
| 844 | while (1) { |
| 845 | int len; |
| 846 | char *ret; |
| 847 | |
| 848 | linesize += 512; |
| 849 | line = srealloc(line, linesize); |
| 850 | ret = fgets(line + linelen, linesize - linelen, fp); |
| 851 | if (modeflags & 1) { |
| 852 | printf("%s", ret); |
| 853 | } |
| 854 | |
| 855 | if (!ret || (linelen == 0 && line[0] == '\0')) { |
| 856 | cmd->obey = sftp_cmd_quit; |
| 857 | printf("quit\n"); |
| 858 | return cmd; /* eof */ |
| 859 | } |
| 860 | len = linelen + strlen(line + linelen); |
| 861 | linelen += len; |
| 862 | if (line[linelen - 1] == '\n') { |
| 863 | linelen--; |
| 864 | line[linelen] = '\0'; |
| 865 | break; |
| 866 | } |
| 867 | } |
| 868 | |
| 869 | /* |
| 870 | * Parse the command line into words. The syntax is: |
| 871 | * - double quotes are removed, but cause spaces within to be |
| 872 | * treated as non-separating. |
| 873 | * - a double-doublequote pair is a literal double quote, inside |
| 874 | * _or_ outside quotes. Like this: |
| 875 | * |
| 876 | * firstword "second word" "this has ""quotes"" in" sodoes""this"" |
| 877 | * |
| 878 | * becomes |
| 879 | * |
| 880 | * >firstword< |
| 881 | * >second word< |
| 882 | * >this has "quotes" in< |
| 883 | * >sodoes"this"< |
| 884 | */ |
| 885 | p = line; |
| 886 | while (*p) { |
| 887 | /* skip whitespace */ |
| 888 | while (*p && (*p == ' ' || *p == '\t')) |
| 889 | p++; |
| 890 | /* mark start of word */ |
| 891 | q = r = p; /* q sits at start, r writes word */ |
| 892 | quoting = 0; |
| 893 | while (*p) { |
| 894 | if (!quoting && (*p == ' ' || *p == '\t')) |
| 895 | break; /* reached end of word */ |
| 896 | else if (*p == '"' && p[1] == '"') |
| 897 | p += 2, *r++ = '"'; /* a literal quote */ |
| 898 | else if (*p == '"') |
| 899 | p++, quoting = !quoting; |
| 900 | else |
| 901 | *r++ = *p++; |
| 902 | } |
| 903 | if (*p) |
| 904 | p++; /* skip over the whitespace */ |
| 905 | *r = '\0'; |
| 906 | if (cmd->nwords >= cmd->wordssize) { |
| 907 | cmd->wordssize = cmd->nwords + 16; |
| 908 | cmd->words = |
| 909 | srealloc(cmd->words, cmd->wordssize * sizeof(char *)); |
| 910 | } |
| 911 | cmd->words[cmd->nwords++] = q; |
| 912 | } |
| 913 | |
| 914 | /* |
| 915 | * Now parse the first word and assign a function. |
| 916 | */ |
| 917 | |
| 918 | if (cmd->nwords == 0) |
| 919 | cmd->obey = sftp_cmd_null; |
| 920 | else { |
| 921 | int i, j, k, cmp; |
| 922 | |
| 923 | cmd->obey = sftp_cmd_unknown; |
| 924 | |
| 925 | i = -1; |
| 926 | j = sizeof(sftp_lookup) / sizeof(*sftp_lookup); |
| 927 | while (j - i > 1) { |
| 928 | k = (j + i) / 2; |
| 929 | cmp = strcmp(cmd->words[0], sftp_lookup[k].name); |
| 930 | if (cmp < 0) |
| 931 | j = k; |
| 932 | else if (cmp > 0) |
| 933 | i = k; |
| 934 | else { |
| 935 | cmd->obey = sftp_lookup[k].obey; |
| 936 | break; |
| 937 | } |
| 938 | } |
| 939 | } |
| 940 | |
| 941 | return cmd; |
| 942 | } |
| 943 | |
| 944 | void do_sftp(int mode, int modeflags, char *batchfile) |
| 945 | { |
| 946 | FILE *fp; |
| 947 | |
| 948 | /* |
| 949 | * Do protocol initialisation. |
| 950 | */ |
| 951 | if (!fxp_init()) { |
| 952 | fprintf(stderr, |
| 953 | "Fatal: unable to initialise SFTP: %s\n", fxp_error()); |
| 954 | return; |
| 955 | } |
| 956 | |
| 957 | /* |
| 958 | * Find out where our home directory is. |
| 959 | */ |
| 960 | homedir = fxp_realpath("."); |
| 961 | if (!homedir) { |
| 962 | fprintf(stderr, |
| 963 | "Warning: failed to resolve home directory: %s\n", |
| 964 | fxp_error()); |
| 965 | homedir = dupstr("."); |
| 966 | } else { |
| 967 | printf("Remote working directory is %s\n", homedir); |
| 968 | } |
| 969 | pwd = dupstr(homedir); |
| 970 | |
| 971 | /* |
| 972 | * Batch mode? |
| 973 | */ |
| 974 | if (mode == 0) { |
| 975 | |
| 976 | /* ------------------------------------------------------------------ |
| 977 | * Now we're ready to do Real Stuff. |
| 978 | */ |
| 979 | while (1) { |
| 980 | struct sftp_command *cmd; |
| 981 | cmd = sftp_getcmd(stdin, 0, 0); |
| 982 | if (!cmd) |
| 983 | break; |
| 984 | if (cmd->obey(cmd) < 0) |
| 985 | break; |
| 986 | } |
| 987 | } else { |
| 988 | fp = fopen(batchfile, "r"); |
| 989 | if (!fp) { |
| 990 | printf("Fatal: unable to open %s\n", batchfile); |
| 991 | return; |
| 992 | } |
| 993 | while (1) { |
| 994 | struct sftp_command *cmd; |
| 995 | cmd = sftp_getcmd(fp, mode, modeflags); |
| 996 | if (!cmd) |
| 997 | break; |
| 998 | if (cmd->obey(cmd) < 0) |
| 999 | break; |
| 1000 | if (fxp_error() != NULL) { |
| 1001 | if (!(modeflags & 2)) |
| 1002 | break; |
| 1003 | } |
| 1004 | } |
| 1005 | fclose(fp); |
| 1006 | |
| 1007 | } |
| 1008 | } |
| 1009 | |
| 1010 | /* ---------------------------------------------------------------------- |
| 1011 | * Dirty bits: integration with PuTTY. |
| 1012 | */ |
| 1013 | |
| 1014 | static int verbose = 0; |
| 1015 | |
| 1016 | void verify_ssh_host_key(char *host, int port, char *keytype, |
| 1017 | char *keystr, char *fingerprint) |
| 1018 | { |
| 1019 | int ret; |
| 1020 | HANDLE hin; |
| 1021 | DWORD savemode, i; |
| 1022 | |
| 1023 | static const char absentmsg[] = |
| 1024 | "The server's host key is not cached in the registry. You\n" |
| 1025 | "have no guarantee that the server is the computer you\n" |
| 1026 | "think it is.\n" |
| 1027 | "The server's key fingerprint is:\n" |
| 1028 | "%s\n" |
| 1029 | "If you trust this host, enter \"y\" to add the key to\n" |
| 1030 | "PuTTY's cache and carry on connecting.\n" |
| 1031 | "If you want to carry on connecting just once, without\n" |
| 1032 | "adding the key to the cache, enter \"n\".\n" |
| 1033 | "If you do not trust this host, press Return to abandon the\n" |
| 1034 | "connection.\n" |
| 1035 | "Store key in cache? (y/n) "; |
| 1036 | |
| 1037 | static const char wrongmsg[] = |
| 1038 | "WARNING - POTENTIAL SECURITY BREACH!\n" |
| 1039 | "The server's host key does not match the one PuTTY has\n" |
| 1040 | "cached in the registry. This means that either the\n" |
| 1041 | "server administrator has changed the host key, or you\n" |
| 1042 | "have actually connected to another computer pretending\n" |
| 1043 | "to be the server.\n" |
| 1044 | "The new key fingerprint is:\n" |
| 1045 | "%s\n" |
| 1046 | "If you were expecting this change and trust the new key,\n" |
| 1047 | "enter \"y\" to update PuTTY's cache and continue connecting.\n" |
| 1048 | "If you want to carry on connecting but without updating\n" |
| 1049 | "the cache, enter \"n\".\n" |
| 1050 | "If you want to abandon the connection completely, press\n" |
| 1051 | "Return to cancel. Pressing Return is the ONLY guaranteed\n" |
| 1052 | "safe choice.\n" |
| 1053 | "Update cached key? (y/n, Return cancels connection) "; |
| 1054 | |
| 1055 | static const char abandoned[] = "Connection abandoned.\n"; |
| 1056 | |
| 1057 | char line[32]; |
| 1058 | |
| 1059 | /* |
| 1060 | * Verify the key against the registry. |
| 1061 | */ |
| 1062 | ret = verify_host_key(host, port, keytype, keystr); |
| 1063 | |
| 1064 | if (ret == 0) /* success - key matched OK */ |
| 1065 | return; |
| 1066 | |
| 1067 | if (ret == 2) { /* key was different */ |
| 1068 | fprintf(stderr, wrongmsg, fingerprint); |
| 1069 | fflush(stderr); |
| 1070 | } |
| 1071 | if (ret == 1) { /* key was absent */ |
| 1072 | fprintf(stderr, absentmsg, fingerprint); |
| 1073 | fflush(stderr); |
| 1074 | } |
| 1075 | |
| 1076 | hin = GetStdHandle(STD_INPUT_HANDLE); |
| 1077 | GetConsoleMode(hin, &savemode); |
| 1078 | SetConsoleMode(hin, (savemode | ENABLE_ECHO_INPUT | |
| 1079 | ENABLE_PROCESSED_INPUT | ENABLE_LINE_INPUT)); |
| 1080 | ReadFile(hin, line, sizeof(line) - 1, &i, NULL); |
| 1081 | SetConsoleMode(hin, savemode); |
| 1082 | |
| 1083 | if (line[0] != '\0' && line[0] != '\r' && line[0] != '\n') { |
| 1084 | if (line[0] == 'y' || line[0] == 'Y') |
| 1085 | store_host_key(host, port, keytype, keystr); |
| 1086 | } else { |
| 1087 | fprintf(stderr, abandoned); |
| 1088 | exit(0); |
| 1089 | } |
| 1090 | } |
| 1091 | |
| 1092 | /* |
| 1093 | * Ask whether the selected cipher is acceptable (since it was |
| 1094 | * below the configured 'warn' threshold). |
| 1095 | * cs: 0 = both ways, 1 = client->server, 2 = server->client |
| 1096 | */ |
| 1097 | void askcipher(char *ciphername, int cs) |
| 1098 | { |
| 1099 | HANDLE hin; |
| 1100 | DWORD savemode, i; |
| 1101 | |
| 1102 | static const char msg[] = |
| 1103 | "The first %scipher supported by the server is\n" |
| 1104 | "%s, which is below the configured warning threshold.\n" |
| 1105 | "Continue with connection? (y/n) "; |
| 1106 | static const char abandoned[] = "Connection abandoned.\n"; |
| 1107 | |
| 1108 | char line[32]; |
| 1109 | |
| 1110 | fprintf(stderr, msg, |
| 1111 | (cs == 0) ? "" : |
| 1112 | (cs == 1) ? "client-to-server " : |
| 1113 | "server-to-client ", |
| 1114 | ciphername); |
| 1115 | fflush(stderr); |
| 1116 | |
| 1117 | hin = GetStdHandle(STD_INPUT_HANDLE); |
| 1118 | GetConsoleMode(hin, &savemode); |
| 1119 | SetConsoleMode(hin, (savemode | ENABLE_ECHO_INPUT | |
| 1120 | ENABLE_PROCESSED_INPUT | ENABLE_LINE_INPUT)); |
| 1121 | ReadFile(hin, line, sizeof(line) - 1, &i, NULL); |
| 1122 | SetConsoleMode(hin, savemode); |
| 1123 | |
| 1124 | if (line[0] == 'y' || line[0] == 'Y') { |
| 1125 | return; |
| 1126 | } else { |
| 1127 | fprintf(stderr, abandoned); |
| 1128 | exit(0); |
| 1129 | } |
| 1130 | } |
| 1131 | |
| 1132 | /* |
| 1133 | * Print an error message and perform a fatal exit. |
| 1134 | */ |
| 1135 | void fatalbox(char *fmt, ...) |
| 1136 | { |
| 1137 | char str[0x100]; /* Make the size big enough */ |
| 1138 | va_list ap; |
| 1139 | va_start(ap, fmt); |
| 1140 | strcpy(str, "Fatal:"); |
| 1141 | vsprintf(str + strlen(str), fmt, ap); |
| 1142 | va_end(ap); |
| 1143 | strcat(str, "\n"); |
| 1144 | fprintf(stderr, str); |
| 1145 | |
| 1146 | exit(1); |
| 1147 | } |
| 1148 | void connection_fatal(char *fmt, ...) |
| 1149 | { |
| 1150 | char str[0x100]; /* Make the size big enough */ |
| 1151 | va_list ap; |
| 1152 | va_start(ap, fmt); |
| 1153 | strcpy(str, "Fatal:"); |
| 1154 | vsprintf(str + strlen(str), fmt, ap); |
| 1155 | va_end(ap); |
| 1156 | strcat(str, "\n"); |
| 1157 | fprintf(stderr, str); |
| 1158 | |
| 1159 | exit(1); |
| 1160 | } |
| 1161 | |
| 1162 | void logevent(char *string) |
| 1163 | { |
| 1164 | } |
| 1165 | |
| 1166 | void ldisc_send(char *buf, int len) |
| 1167 | { |
| 1168 | /* |
| 1169 | * This is only here because of the calls to ldisc_send(NULL, |
| 1170 | * 0) in ssh.c. Nothing in PSFTP actually needs to use the |
| 1171 | * ldisc as an ldisc. So if we get called with any real data, I |
| 1172 | * want to know about it. |
| 1173 | */ |
| 1174 | assert(len == 0); |
| 1175 | } |
| 1176 | |
| 1177 | /* |
| 1178 | * Be told what socket we're supposed to be using. |
| 1179 | */ |
| 1180 | static SOCKET sftp_ssh_socket; |
| 1181 | char *do_select(SOCKET skt, int startup) |
| 1182 | { |
| 1183 | if (startup) |
| 1184 | sftp_ssh_socket = skt; |
| 1185 | else |
| 1186 | sftp_ssh_socket = INVALID_SOCKET; |
| 1187 | return NULL; |
| 1188 | } |
| 1189 | extern int select_result(WPARAM, LPARAM); |
| 1190 | |
| 1191 | /* |
| 1192 | * Receive a block of data from the SSH link. Block until all data |
| 1193 | * is available. |
| 1194 | * |
| 1195 | * To do this, we repeatedly call the SSH protocol module, with our |
| 1196 | * own trap in from_backend() to catch the data that comes back. We |
| 1197 | * do this until we have enough data. |
| 1198 | */ |
| 1199 | |
| 1200 | static unsigned char *outptr; /* where to put the data */ |
| 1201 | static unsigned outlen; /* how much data required */ |
| 1202 | static unsigned char *pending = NULL; /* any spare data */ |
| 1203 | static unsigned pendlen = 0, pendsize = 0; /* length and phys. size of buffer */ |
| 1204 | int from_backend(int is_stderr, char *data, int datalen) |
| 1205 | { |
| 1206 | unsigned char *p = (unsigned char *) data; |
| 1207 | unsigned len = (unsigned) datalen; |
| 1208 | |
| 1209 | /* |
| 1210 | * stderr data is just spouted to local stderr and otherwise |
| 1211 | * ignored. |
| 1212 | */ |
| 1213 | if (is_stderr) { |
| 1214 | fwrite(data, 1, len, stderr); |
| 1215 | return 0; |
| 1216 | } |
| 1217 | |
| 1218 | /* |
| 1219 | * If this is before the real session begins, just return. |
| 1220 | */ |
| 1221 | if (!outptr) |
| 1222 | return 0; |
| 1223 | |
| 1224 | if (outlen > 0) { |
| 1225 | unsigned used = outlen; |
| 1226 | if (used > len) |
| 1227 | used = len; |
| 1228 | memcpy(outptr, p, used); |
| 1229 | outptr += used; |
| 1230 | outlen -= used; |
| 1231 | p += used; |
| 1232 | len -= used; |
| 1233 | } |
| 1234 | |
| 1235 | if (len > 0) { |
| 1236 | if (pendsize < pendlen + len) { |
| 1237 | pendsize = pendlen + len + 4096; |
| 1238 | pending = (pending ? srealloc(pending, pendsize) : |
| 1239 | smalloc(pendsize)); |
| 1240 | if (!pending) |
| 1241 | fatalbox("Out of memory"); |
| 1242 | } |
| 1243 | memcpy(pending + pendlen, p, len); |
| 1244 | pendlen += len; |
| 1245 | } |
| 1246 | |
| 1247 | return 0; |
| 1248 | } |
| 1249 | int sftp_recvdata(char *buf, int len) |
| 1250 | { |
| 1251 | outptr = (unsigned char *) buf; |
| 1252 | outlen = len; |
| 1253 | |
| 1254 | /* |
| 1255 | * See if the pending-input block contains some of what we |
| 1256 | * need. |
| 1257 | */ |
| 1258 | if (pendlen > 0) { |
| 1259 | unsigned pendused = pendlen; |
| 1260 | if (pendused > outlen) |
| 1261 | pendused = outlen; |
| 1262 | memcpy(outptr, pending, pendused); |
| 1263 | memmove(pending, pending + pendused, pendlen - pendused); |
| 1264 | outptr += pendused; |
| 1265 | outlen -= pendused; |
| 1266 | pendlen -= pendused; |
| 1267 | if (pendlen == 0) { |
| 1268 | pendsize = 0; |
| 1269 | sfree(pending); |
| 1270 | pending = NULL; |
| 1271 | } |
| 1272 | if (outlen == 0) |
| 1273 | return 1; |
| 1274 | } |
| 1275 | |
| 1276 | while (outlen > 0) { |
| 1277 | fd_set readfds; |
| 1278 | |
| 1279 | FD_ZERO(&readfds); |
| 1280 | FD_SET(sftp_ssh_socket, &readfds); |
| 1281 | if (select(1, &readfds, NULL, NULL, NULL) < 0) |
| 1282 | return 0; /* doom */ |
| 1283 | select_result((WPARAM) sftp_ssh_socket, (LPARAM) FD_READ); |
| 1284 | } |
| 1285 | |
| 1286 | return 1; |
| 1287 | } |
| 1288 | int sftp_senddata(char *buf, int len) |
| 1289 | { |
| 1290 | back->send((unsigned char *) buf, len); |
| 1291 | return 1; |
| 1292 | } |
| 1293 | |
| 1294 | /* |
| 1295 | * Loop through the ssh connection and authentication process. |
| 1296 | */ |
| 1297 | static void ssh_sftp_init(void) |
| 1298 | { |
| 1299 | if (sftp_ssh_socket == INVALID_SOCKET) |
| 1300 | return; |
| 1301 | while (!back->sendok()) { |
| 1302 | fd_set readfds; |
| 1303 | FD_ZERO(&readfds); |
| 1304 | FD_SET(sftp_ssh_socket, &readfds); |
| 1305 | if (select(1, &readfds, NULL, NULL, NULL) < 0) |
| 1306 | return; /* doom */ |
| 1307 | select_result((WPARAM) sftp_ssh_socket, (LPARAM) FD_READ); |
| 1308 | } |
| 1309 | } |
| 1310 | |
| 1311 | static char *password = NULL; |
| 1312 | static int get_line(const char *prompt, char *str, int maxlen, int is_pw) |
| 1313 | { |
| 1314 | HANDLE hin, hout; |
| 1315 | DWORD savemode, newmode, i; |
| 1316 | |
| 1317 | if (password) { |
| 1318 | static int tried_once = 0; |
| 1319 | |
| 1320 | if (tried_once) { |
| 1321 | return 0; |
| 1322 | } else { |
| 1323 | strncpy(str, password, maxlen); |
| 1324 | str[maxlen - 1] = '\0'; |
| 1325 | tried_once = 1; |
| 1326 | return 1; |
| 1327 | } |
| 1328 | } |
| 1329 | |
| 1330 | hin = GetStdHandle(STD_INPUT_HANDLE); |
| 1331 | hout = GetStdHandle(STD_OUTPUT_HANDLE); |
| 1332 | if (hin == INVALID_HANDLE_VALUE || hout == INVALID_HANDLE_VALUE) { |
| 1333 | fprintf(stderr, "Cannot get standard input/output handles\n"); |
| 1334 | exit(1); |
| 1335 | } |
| 1336 | |
| 1337 | GetConsoleMode(hin, &savemode); |
| 1338 | newmode = savemode | ENABLE_PROCESSED_INPUT | ENABLE_LINE_INPUT; |
| 1339 | if (is_pw) |
| 1340 | newmode &= ~ENABLE_ECHO_INPUT; |
| 1341 | else |
| 1342 | newmode |= ENABLE_ECHO_INPUT; |
| 1343 | SetConsoleMode(hin, newmode); |
| 1344 | |
| 1345 | WriteFile(hout, prompt, strlen(prompt), &i, NULL); |
| 1346 | ReadFile(hin, str, maxlen - 1, &i, NULL); |
| 1347 | |
| 1348 | SetConsoleMode(hin, savemode); |
| 1349 | |
| 1350 | if ((int) i > maxlen) |
| 1351 | i = maxlen - 1; |
| 1352 | else |
| 1353 | i = i - 2; |
| 1354 | str[i] = '\0'; |
| 1355 | |
| 1356 | if (is_pw) |
| 1357 | WriteFile(hout, "\r\n", 2, &i, NULL); |
| 1358 | |
| 1359 | return 1; |
| 1360 | } |
| 1361 | |
| 1362 | /* |
| 1363 | * Initialize the Win$ock driver. |
| 1364 | */ |
| 1365 | static void init_winsock(void) |
| 1366 | { |
| 1367 | WORD winsock_ver; |
| 1368 | WSADATA wsadata; |
| 1369 | |
| 1370 | winsock_ver = MAKEWORD(1, 1); |
| 1371 | if (WSAStartup(winsock_ver, &wsadata)) { |
| 1372 | fprintf(stderr, "Unable to initialise WinSock"); |
| 1373 | exit(1); |
| 1374 | } |
| 1375 | if (LOBYTE(wsadata.wVersion) != 1 || HIBYTE(wsadata.wVersion) != 1) { |
| 1376 | fprintf(stderr, "WinSock version is incompatible with 1.1"); |
| 1377 | exit(1); |
| 1378 | } |
| 1379 | } |
| 1380 | |
| 1381 | /* |
| 1382 | * Short description of parameters. |
| 1383 | */ |
| 1384 | static void usage(void) |
| 1385 | { |
| 1386 | printf("PuTTY Secure File Transfer (SFTP) client\n"); |
| 1387 | printf("%s\n", ver); |
| 1388 | printf("Usage: psftp [options] user@host\n"); |
| 1389 | printf("Options:\n"); |
| 1390 | printf(" -b file use specified batchfile\n"); |
| 1391 | printf(" -bc output batchfile commands\n"); |
| 1392 | printf(" -be don't stop batchfile processing if errors\n"); |
| 1393 | printf(" -v show verbose messages\n"); |
| 1394 | printf(" -P port connect to specified port\n"); |
| 1395 | printf(" -pw passw login with specified password\n"); |
| 1396 | exit(1); |
| 1397 | } |
| 1398 | |
| 1399 | /* |
| 1400 | * Main program. Parse arguments etc. |
| 1401 | */ |
| 1402 | int main(int argc, char *argv[]) |
| 1403 | { |
| 1404 | int i; |
| 1405 | int portnumber = 0; |
| 1406 | char *user, *host, *userhost, *realhost; |
| 1407 | char *err; |
| 1408 | int mode = 0; |
| 1409 | int modeflags = 0; |
| 1410 | char *batchfile = NULL; |
| 1411 | |
| 1412 | flags = FLAG_STDERR | FLAG_INTERACTIVE; |
| 1413 | ssh_get_line = &get_line; |
| 1414 | init_winsock(); |
| 1415 | sk_init(); |
| 1416 | |
| 1417 | userhost = user = NULL; |
| 1418 | |
| 1419 | for (i = 1; i < argc; i++) { |
| 1420 | if (argv[i][0] != '-') { |
| 1421 | if (userhost) |
| 1422 | usage(); |
| 1423 | else |
| 1424 | userhost = dupstr(argv[i]); |
| 1425 | } else if (strcmp(argv[i], "-v") == 0) { |
| 1426 | verbose = 1, flags |= FLAG_VERBOSE; |
| 1427 | } else if (strcmp(argv[i], "-h") == 0 || |
| 1428 | strcmp(argv[i], "-?") == 0) { |
| 1429 | usage(); |
| 1430 | } else if (strcmp(argv[i], "-l") == 0 && i + 1 < argc) { |
| 1431 | user = argv[++i]; |
| 1432 | } else if (strcmp(argv[i], "-P") == 0 && i + 1 < argc) { |
| 1433 | portnumber = atoi(argv[++i]); |
| 1434 | } else if (strcmp(argv[i], "-pw") == 0 && i + 1 < argc) { |
| 1435 | password = argv[++i]; |
| 1436 | } else if (strcmp(argv[i], "-b") == 0 && i + 1 < argc) { |
| 1437 | mode = 1; |
| 1438 | batchfile = argv[++i]; |
| 1439 | } else if (strcmp(argv[i], "-bc") == 0 && i + 1 < argc) { |
| 1440 | modeflags = modeflags | 1; |
| 1441 | } else if (strcmp(argv[i], "-be") == 0 && i + 1 < argc) { |
| 1442 | modeflags = modeflags | 2; |
| 1443 | } else if (strcmp(argv[i], "--") == 0) { |
| 1444 | i++; |
| 1445 | break; |
| 1446 | } else { |
| 1447 | usage(); |
| 1448 | } |
| 1449 | } |
| 1450 | argc -= i; |
| 1451 | argv += i; |
| 1452 | back = NULL; |
| 1453 | |
| 1454 | if (argc > 0 || !userhost) |
| 1455 | usage(); |
| 1456 | |
| 1457 | /* Separate host and username */ |
| 1458 | host = userhost; |
| 1459 | host = strrchr(host, '@'); |
| 1460 | if (host == NULL) { |
| 1461 | host = userhost; |
| 1462 | } else { |
| 1463 | *host++ = '\0'; |
| 1464 | if (user) { |
| 1465 | printf("psftp: multiple usernames specified; using \"%s\"\n", |
| 1466 | user); |
| 1467 | } else |
| 1468 | user = userhost; |
| 1469 | } |
| 1470 | |
| 1471 | /* Try to load settings for this host */ |
| 1472 | do_defaults(host, &cfg); |
| 1473 | if (cfg.host[0] == '\0') { |
| 1474 | /* No settings for this host; use defaults */ |
| 1475 | do_defaults(NULL, &cfg); |
| 1476 | strncpy(cfg.host, host, sizeof(cfg.host) - 1); |
| 1477 | cfg.host[sizeof(cfg.host) - 1] = '\0'; |
| 1478 | cfg.port = 22; |
| 1479 | } |
| 1480 | |
| 1481 | /* Set username */ |
| 1482 | if (user != NULL && user[0] != '\0') { |
| 1483 | strncpy(cfg.username, user, sizeof(cfg.username) - 1); |
| 1484 | cfg.username[sizeof(cfg.username) - 1] = '\0'; |
| 1485 | } |
| 1486 | if (!cfg.username[0]) { |
| 1487 | printf("login as: "); |
| 1488 | if (!fgets(cfg.username, sizeof(cfg.username), stdin)) { |
| 1489 | fprintf(stderr, "psftp: aborting\n"); |
| 1490 | exit(1); |
| 1491 | } else { |
| 1492 | int len = strlen(cfg.username); |
| 1493 | if (cfg.username[len - 1] == '\n') |
| 1494 | cfg.username[len - 1] = '\0'; |
| 1495 | } |
| 1496 | } |
| 1497 | |
| 1498 | if (cfg.protocol != PROT_SSH) |
| 1499 | cfg.port = 22; |
| 1500 | |
| 1501 | if (portnumber) |
| 1502 | cfg.port = portnumber; |
| 1503 | |
| 1504 | /* SFTP uses SSH2 by default always */ |
| 1505 | cfg.sshprot = 2; |
| 1506 | |
| 1507 | /* Set up subsystem name. */ |
| 1508 | strcpy(cfg.remote_cmd, "sftp"); |
| 1509 | cfg.ssh_subsys = TRUE; |
| 1510 | cfg.nopty = TRUE; |
| 1511 | |
| 1512 | /* |
| 1513 | * Set up fallback option, for SSH1 servers or servers with the |
| 1514 | * sftp subsystem not enabled but the server binary installed |
| 1515 | * in the usual place. We only support fallback on Unix |
| 1516 | * systems, and we use a kludgy piece of shellery which should |
| 1517 | * try to find sftp-server in various places (the obvious |
| 1518 | * systemwide spots /usr/lib and /usr/local/lib, and then the |
| 1519 | * user's PATH) and finally give up. |
| 1520 | * |
| 1521 | * test -x /usr/lib/sftp-server && exec /usr/lib/sftp-server |
| 1522 | * test -x /usr/local/lib/sftp-server && exec /usr/local/lib/sftp-server |
| 1523 | * exec sftp-server |
| 1524 | * |
| 1525 | * the idea being that this will attempt to use either of the |
| 1526 | * obvious pathnames and then give up, and when it does give up |
| 1527 | * it will print the preferred pathname in the error messages. |
| 1528 | */ |
| 1529 | cfg.remote_cmd_ptr2 = |
| 1530 | "test -x /usr/lib/sftp-server && exec /usr/lib/sftp-server\n" |
| 1531 | "test -x /usr/local/lib/sftp-server && exec /usr/local/lib/sftp-server\n" |
| 1532 | "exec sftp-server"; |
| 1533 | cfg.ssh_subsys2 = FALSE; |
| 1534 | |
| 1535 | back = &ssh_backend; |
| 1536 | |
| 1537 | err = back->init(cfg.host, cfg.port, &realhost); |
| 1538 | if (err != NULL) { |
| 1539 | fprintf(stderr, "ssh_init: %s", err); |
| 1540 | return 1; |
| 1541 | } |
| 1542 | ssh_sftp_init(); |
| 1543 | if (verbose && realhost != NULL) |
| 1544 | printf("Connected to %s\n", realhost); |
| 1545 | |
| 1546 | do_sftp(mode, modeflags, batchfile); |
| 1547 | |
| 1548 | if (back != NULL && back->socket() != NULL) { |
| 1549 | char ch; |
| 1550 | back->special(TS_EOF); |
| 1551 | sftp_recvdata(&ch, 1); |
| 1552 | } |
| 1553 | WSACleanup(); |
| 1554 | random_save_seed(); |
| 1555 | |
| 1556 | return 0; |
| 1557 | } |